636 area code: location, time zone and numbers
Since 1999, 636 has served as a US telephone area code for St. Louis, Missouri.
- Location
- Missouri: St. Louis
- Service start date
- 1999
- Time zone used
- Uses Central time
- Overlay
- No overlay: it is the only code for its area
- Calling locally
- Dialling takes 7 digits
- Rate centre list
- 46
- Exhaust, projected
- 2075
- Country calling code
- +1 (United States)
Figures come from NANPA public reports, including the area code report and the rate-centre report, with a file date of 11/01/2026. The exhaust year is based on NANPA projections 2026-1 (April 2026). It is not an official NANPA site.
Get hold of a 636 number
A 636 number is available through two routes. With its plan, a provider assigns a new number, picked at sign-up from numbers the provider holds in the code. Sellers list numbers they already have, often with a pattern, and set a one-time price; you then move the number on to a provider.
Providers ranked by first-year cost
| Provider | Cheapest plan | First year | Link |
|---|---|---|---|
 Free app | Basic (Just for me), free | $0 | Open Google Voice |
 Free app | Free plan, free | $0 | Open TextNow |
 Developer API | Pay-as-you-go local number, $1.15 a month | $13.80 | Open Twilio |
 Second-number app | Standard, $3.99 a month billed yearly | $47.99 | Open Burner |
 Toll-free specialist | Solo, $6.99 a month billed yearly | $84 | Open UniTel Voice |
 Second-number app | Deluxe (local number), $6.99 a month billed yearly | $102.88 | Open GoDaddy Conversations (formerly Smartline) |
Sellers listing local numbers
| Seller | What it sells | Listed price | Monthly fee | Link |
|---|---|---|---|---|
 Marketplace | Local numbers | From $9 one-time | None stated | Search at Exclusive Digits |
 Marketplace | Local and toll-free | From $9.95 one-time | $2.99 a month | Search at NumberBarn |
 Number broker | Local and toll-free | From $99 one-time | None stated | Search at RingBoost |
 Number broker | Local and toll-free | From $100 one-time | None stated | Search at PhoneNumberExpert |
| 212areacode.comNumber broker | Local numbers | From $150 one-time | None stated | Search at 212areacode.com |
Some sellers and providers may pay us a referral fee. The order always follows first-year cost, no matter what. How we earn
Places in the 636 area code
For 636, NANPA lists 46 rate centres. Each one is a local calling area where numbers get assigned:
Antonia, Augusta and Cedar Hill. Chesterfield, Dardenne and De Soto. Defiance, Eureka and Fenton. Foley, Foristell and Festus Crystal City. Gray Summit, Harvester and Hawk Point. Herculaneum-pevely, High Hill and High Ridge. Hillsboro, Holstein and Imperial. Jonesburg, Manchester and Marthasville. Maxville, Moscow Mills and New Melle. O'fallon, Old Monroe and Orchard Farm. Pacific, Pond and Portage Des Sioux. Saint Charles, Saint Clair and Saint Peters. Troy, Truxton and Union. Valley Park, Ware and Warrenton. Washington, Wentzville and Winfield. Wright City.
Area codes related to this one
Other Missouri area codes: 235, 975, 557, 660, 573, 417, 816 and 314.
636 area code questions
Where is the 636 area code?
Calls to 636 ring in St. Louis, Missouri, and the surrounding St. Louis, MO-IL area.
Which country code do you use for a 636 number?
+1. Because 636 belongs to the North American Numbering Plan, callers abroad dial +1 636 followed by the 7-digit number.
What time is it in the 636 area code?
Central time applies to 636.
Who uses a 636 number to call?
People with numbers in this code include homes, mobiles, local businesses and callers who fake a local number. When you see a 636 number on your screen, it shows where the number was assigned. It does not identify who is calling.